Ethylene glycol, at 100ºC, is cooled along a vertical flat plate at 20ºC. The plate is 1 m high and 0.5 m wide. Estimate the heat transfer.

What will be an ideal response?


The heat transfer is our customary Newton’s law of cooling. The area of heat transfer is 0.5 m^2 and the temperature difference is 80K. Using Equation 5-43 with Table 5-1 will give the convective heat transfer coefficient. The Prandtl number is determining using properties of ethylene glycol from appendix Table B-3 and the Prandtl number is 198.6. The Grashof-Prandtl product, or Rayleigh number is

Physics & Space Science

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